Fix typo

Author: shahmishal

.github/workflows/swift_package_test.yml

@@ -31,6 +31,6 @@ jobs:
     container: 
        image: ${{ (contains(matrix.swift_version, 'nightly') && 'swiftlang/swift') || 'swift' }}:${{ matrix.swift_version }}-${{ matrix.os_version }}
     steps:
-      if: !contains(fromJson(inputs.os_versions), matrix.swift_version)
+      - if: !contains(fromJson(inputs.os_versions), matrix.swift_version)
       - uses: actions/checkout@v2
       - run: swift test ${{ (contains(matrix.swift_version, 'nightly') && inputs.swift_nightly_flags) || inputs.swift_flags }}